package com.module.base.utils;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;


/**
 * Author: yanxuwen
 * Date: 2023/1/17
 * Desc: 属性复制
 */
public class CopyPropertiesUtils {

    /**
     * 利用反射实现对象之间属性复制
     * 通过方法set来设置值
     *
     * @param from
     * @param to
     */
    public static void copyProperties(Object from, Object to) {
        try {
            copyPropertiesExclude(from, to, null);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 复制对象属性
     *
     * @param from
     * @param to
     * @param excludsArray 排除属性列表
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static void copyPropertiesExclude(Object from, Object to, String[] excludsArray) throws Exception {
        List<String> excludesList = null;
        if (excludsArray != null && excludsArray.length > 0) {
            excludesList = Arrays.asList(excludsArray);    //构造列表对象
        }
        Method[] fromMethods = getDeclaredMethods(from);
        Method[] toMethods = getDeclaredMethods(to);
        Method fromMethod = null, toMethod = null;
        String fromMethodName = null, toMethodName = null;
        for (int i = 0; i < fromMethods.length; i++) {
            fromMethod = fromMethods[i];
            fromMethodName = fromMethod.getName();
            int formNum = 0;
            if (fromMethodName.contains("get")) {
                formNum = 3;
            } else if (fromMethodName.contains("is")) {
                formNum = 2;
            }
            if (formNum <= 0) {
                continue;
            }
            //排除列表检测
            if (excludesList != null && excludesList.contains(fromMethodName.substring(formNum).toLowerCase())) {
                continue;
            }
            toMethodName = "set" + fromMethodName.substring(formNum);
            toMethod = findMethodByName(toMethods, toMethodName);
            if (toMethod == null)
                continue;
            Object value = fromMethod.invoke(from, new Object[0]);
            if (value == null)
                continue;
            //集合类判空处理
            if (value instanceof Collection) {
                Collection newValue = (Collection) value;
                if (newValue.size() <= 0)
                    continue;
            }
            toMethod.invoke(to, new Object[]{value});
        }
    }

    /**
     * 对象属性值复制，仅复制指定名称的属性值
     *
     * @param from
     * @param to
     * @param includsArray
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static void copyPropertiesInclude(Object from, Object to, String[] includsArray) throws Exception {
        List<String> includesList = null;
        if (includsArray != null && includsArray.length > 0) {
            includesList = Arrays.asList(includsArray);    //构造列表对象
        } else {
            return;
        }
        Method[] fromMethods = from.getClass().getDeclaredMethods();
        Method[] toMethods = to.getClass().getDeclaredMethods();
        Method fromMethod = null, toMethod = null;
        String fromMethodName = null, toMethodName = null;
        for (int i = 0; i < fromMethods.length; i++) {
            fromMethod = fromMethods[i];
            fromMethodName = fromMethod.getName();
            int formNum = 0;
            if (fromMethodName.contains("get")) {
                formNum = 3;
            } else if (fromMethodName.contains("is")) {
                formNum = 2;
            }
            if (formNum <= 0) {
                continue;
            }
            //排除列表检测
            String str = fromMethodName.substring(formNum);
            if (!includesList.contains(str.substring(0, 1).toLowerCase() + str.substring(1))) {
                continue;
            }
            toMethodName = "set" + fromMethodName.substring(formNum);
            toMethod = findMethodByName(toMethods, toMethodName);
            if (toMethod == null)
                continue;
            Object value = fromMethod.invoke(from, new Object[0]);
            if (value == null)
                continue;
            //集合类判空处理
            if (value instanceof Collection) {
                Collection newValue = (Collection) value;
                if (newValue.size() <= 0)
                    continue;
            }
            toMethod.invoke(to, new Object[]{value});
        }
    }

    /**
     * 复制对象属性
     * 通过属性来复制
     *
     * @param from
     * @param to
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static void copyProperties2(Object from, Object to) {
        try {
            Field[] fromFields = getDeclaredFields(from);
            Field[] toFields = getDeclaredFields(to);
            Field fromField = null, toField = null;
            String fromFieldName = null, toFieldName = null;
            for (int i = 0; i < fromFields.length; i++) {
                fromField = fromFields[i];
                fromFieldName = fromField.getName();

                toField = findFieldByName(toFields, fromFieldName);
                if (toField == null)
                    continue;
                toField.setAccessible(true);
                fromField.setAccessible(true);
                toField.set(to, fromField.get(from));
            }
        } catch (Exception e) {

        }
    }

    /**
     * /**
     * 从方法数组中获取指定名称的方法
     *
     * @param methods
     * @param name
     * @return
     */
    public static Method findMethodByName(Method[] methods, String name) {
        for (int j = 0; j < methods.length; j++) {
            if (methods[j].getName().equals(name))
                return methods[j];
        }
        return null;
    }

    /**
     * 从变量数组中获取指定名称的方法
     *
     * @param fields
     * @param name
     * @return
     */
    public static Field findFieldByName(Field[] fields, String name) {
        for (int j = 0; j < fields.length; j++) {
            if (fields[j].getName().equals(name))
                return fields[j];
        }
        return null;
    }

    /**
     * 获取方法，以及获取所有的父类方法
     */
    private static Method[] getDeclaredMethods(Object from) {
        Class myClass = from.getClass();
        List<Method> list = new ArrayList<>();
        for (; ; ) {
            if (myClass != null && !myClass.getCanonicalName().equals("java.lang.Object")) {
                list.addAll(Arrays.asList(myClass.getDeclaredMethods()));
            } else {
                break;
            }
            myClass = myClass.getSuperclass();
        }
        return list.toArray(new Method[list.size()]);
    }

    /**
     * 获取变量，以及获取所有的父类变量
     */
    private static Field[] getDeclaredFields(Object from) {
        Class myClass = from.getClass();
        List<Field> list = new ArrayList<>();
        for (; ; ) {
            if (myClass != null && !myClass.getCanonicalName().equals("java.lang.Object")) {
                list.addAll(Arrays.asList(myClass.getDeclaredFields()));
            } else {
                break;
            }
            myClass = myClass.getSuperclass();
        }
        return list.toArray(new Field[list.size()]);
    }
}
